Mathematics, 30.03.2020 00:27 travisjpatterson
There is a product that is defective with the probability of 0.03. They are sold in packages of 12. The company offers money back if two or moreare defective. What is the probability that a given package will be returned for cash?
Answers: 3
![P(X=x){n\choose x}p^x(1-p)^{n-x}\\\\P(X\geq 2)=1-P(X\leq 1)\\\\=1-[{12\choose 0}0.03^0(0.97)^{12}+{12\choose 1}0.03^1(0.97)^{11}]\\\\\\=1-[0.69384+0.25751]\\\\\\=0.04865](/tpl/images/0569/8394/887d0.png)
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There is a product that is defective with the probability of 0.03. They are sold in packages of 12....
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